Island



(No Mode1.). 2 Shets-Sheet 1. W. H. SAWYER.

ELECTRICAL GONNEGTING CORD. N0.311,611'. Patented Feb. 3, 1885.

Attorney IJVVEJVTOR Wa'liam-f. Sawyer, E /L (No Model.) 2 Sheets-Sheet2.

W. H. SAWYBR.

ELECTRICAL CONNECTING CORD.

No. 311,611.. Patented Feb. 3, 1885.

Atorney UNITED STATES PATENT OFFICE.

VILLIAM H. SAWTYER, OF PROVIDENCE, RHODE ISLAND.

ELECTRICAL CONNECTlNG-CORD.

SPECIFICATION forming part or' Letters Patent No. 311,611, datedFebruary 3, 1885.

Application tiled September 26, 1881. (No model.)

To @ZZ whom it may concern.-

Be it known that I, WILLIAM H. SAwvEn, a citizen of the United Sta' es,residing at Providence, in the county of Providence and State of RhodeIsland, have invented certain new and useful Improvements in ElectricalConnecting-Cords, ot' which the following is a speciiication, referencebeing had to the accompanying drawings.

My invention relates to electrical connecting-cords comprising twoconductors, and designed for use with hand-telephones and similarinstruments; and it relates especially to that class ot' such cordswhich are provided with a non -conducting suspending cord or branch atone or both ends for sustaining the weight of the instrument and therebytaking the strain olf the conductors.

In providing the non-conducting suspension-cord it has heretofore beencustomary to take two covered conductors and inclose them in a commontubular covering by braiding for a suitable length, taking the twoconduetors out of the braid at each end, and then continuing the braidinthe i'orm of cord for a suitable length, this extended cord-likeportion serving as the suspending-cord and being left somewhat shorterthan the projecting end portions ofthe covered conductors. This methodof providing the eXtra suspensioncord is obviously troublesome andexpensive, in that a considerable manipulation of the braiding apparatusis necessary. ln another connecting-cord a separate 1io11-con 'luctingcord, in addition to the two conductors, runs through the whole lengthofthe common tubular braided covering and projects .from both endsthereof with the projecting end portions of the conductors. ,In thisform it would seem that there is a greater length of nonconducting cordused than is necessary, and it is therefore wasted. rlelephones havealso been suspended by a distinct non-conducting suspending-cord whichis not inclosed in a common covering with the conductor. rIhiscontrivance is clumsy and inconvenient from the fact that conductors andsuspension-cords are liable to become twisted and tangled together.

The object of my invention is to obviate a great portion of the expenseand trouble of manufacture of connecting-cords, as heretol fore,provided with extra suspensiori-branches; and it consists in aconnecting-cord comprising two covered conductors inclosed for the mainportion ot" their length in a common covering, from which they projectat both ends, and a separatcly-formed suspensioncord attached to saidcovered conductors at the crotch or point where they emerge from theircommon covering, this attached suspension-cord being somewhat shorterthan the projecting portions ofthe conductors, so that t-he latter willbe left slack, and thcre'l'ore unstrained when the instrument issuspended.

lt has been found in practice that the onlyT i real disadvantageresulting to the conductor l of a connecting-cord by sustaining theweight ot' the instrument is the loosening ot' the inetallic tips withwhich the conductors are provided, and by which they are connected to lbinding-posts. lherefore it' the end portions ,i ol' the conductors areleft slack there is no obljection to the intermediate portions ot' theconductors and their coverings being made to sustain the weight of theinstrument, or no disadvantage will result to the cord, as a whole, ifthe weight ofthe instrument by aecident or ix'iadvertenee is broughtupon its intermediate portion exclu ive ot' its metallic tips and theends immediately joined thereto. The separately formed and attachedcords or branches therefore answer as well for purposes ot' suspensionas do the integrally-t'ormed extensions ot' the common braided covering,or the non conducting cords extending entirely through and projectingi'rom the ends of the saine. The separately formed and attachedsuspension-cords are much more conveniently provided, and render thecomplete connecting-cord much cheaper than those heretofore constructed.

My invention will be readily understood from the following particulardescription, in connection with the aceon'ipauying drawings, in which-Figure l is a view oi' a connecting-cord constructed according to myinvention. Fig. 2 is aviewol' the separately-formed suspensioncord; andFig. 3 illustrates the manner of attaching such suspension-cord. Fig. etis a view ot" one end of a connecting-cord of modiiied construction, themanner of attaching the suspension-cord being illustrated part-ly in ICOdotted lines. Fig. 5 is a view of one end ot another modifiedconnecting-cord. Fig. 6 is a View of one end of another modifiedcoustruction, and Fig. 7 is a view of the same with a portion ot' theattaching-braiding removed. Fig. 8 is a view of still anothermodification, and Fig. 9 is a sectional view illustrating itsconstruction. Fig. 10 is a view of another connecting-cord involving myinvention.

In Fig. l, the letter A indicates a connecting-cord of ordinaryconstruction, in which two covered conductors are inclosed, except theirend portions, in a common tubular braided covering. These end portionsareindicated by the letters c a, and have metallic tips b b attached tothem in the usual manner. The suspending-cord is designated by theletter C. lt is a distinct piece, as shown in Fig. 3, and is provided atits end with a loop, c, which tightly embraces the two projectingconductors at the point where they emerge from the common tubularcovering. The manner in which this loop is Afastened to the conductorsis illustrated in Fig. 3. It is passed over both conductors, and thenthe suspending-cord is passed in between them under the loop, afterwhich the loop should be forced down snugly to the crotch and thecorddrawn tightly, making a neat and snugy fastening. It' desired, theloop may be tied or stitched in place; but such tying or stitching isnot necessary.

ing-cord are the same as in Fig. l; but a braid is started, as shown, atone end ot' the cord at d, on one of the projecting conductors a shortdistance from the crotch, and is continued down past the same and overthe main covering for a short distance, as shown in dotted llnes. It isthen reversed and braided back to the crotch, from which it is continuedseparately in the i'orni oi' a cord, C. A braid may then be started atthe extreme end of one projecting conductor and continued down past thecrotch i'or a little distance, when it should be reversed and continuedback over the entire projecting portion ot` the other conductor.

The form shown in Fig. 5 is the same as in Fig. 4, except that a pieceot' twisted cord, e, is inclosed in the suspension-maid, the wholeforming the suspension-cord C2.

In the form shown in Figs. 6 and 7 a loop, f, of twisted cord is loopedaround the connecting-cord and has two extended strands of equal length.A braid is started at the crotch and extended downward over the loop andthe main common covering for, say, an inch, and

is then reversed back to the crotch, fronry whence it is continued overthe two extended strands, as at C.

Instead of aloop with two extended strands, a single twisted cord mightbe used with one end tied around the connecting-cord just below thecrotch, and, if desired, still more securely fastened by any ordinaryform ot glue or other adhesive substance.

In the form shown in Figs. SV and 9 one projecting conductor is braideddown to the crotch from its extreme end, the outer braid' conductors ofthe connecting-cord is coveredV 'for its entire length with a braidsimilar to that of the common covering before it is iuclosed in thesame. Itis then inclosed in the tubular braid, as shown at la in dottedlines, with the other conductor, k', which has only its ordinarycovering. After being soinclosed a braid is started at the extremity oi'the conductor with the ordinary covering, as at Z, and it is braideddown to the crotch, the braid being continued past the saine for, say,an inch, as at m, and is then reversed to the crotch, as at a, i'rolnwhence it is continued 1n the form ot a suspending-cord, as at C". InFig. 4- the main portions ot the connect- I have practically used thevarious methods of attaching the suspension-cord which I haveillustrated, and find them all efficient and far more practical andeconomical than the methods heretofore used.

IVhat I claim is- I. An electrical connecting-cord comprising twocovered conductors inclosed in a common braided covering from which theyboth project at both ends, and two non-conducting suspension-cordsseparately formed and attached at or near the points, respectively,where the conductors emerge from their common covering.

2. The combination, with an electrical connecting cord comprising twocovered conductors inclosed in and projecting at both ends from a commontubular covering, of two non conducting suspension cords separatelyformed and attached to the connecting-cord at or near the points,respectively, where the conductors emerge from their common covering.

In testimony whereof I affix my signature in presence ot' two witnesses.

IVILLIAM II. SAIVYER.

\Vitnesses:

GILMAN E. Jorr, W. A. Hitrirlivnv.

IOC)

